[   11.769352][  T264] ip (264) used greatest stack depth: 24464 bytes left
[   13.046698][  T283] ip (283) used greatest stack depth: 24456 bytes left
[   20.628556][  T326] veth2: entered promiscuous mode
[   21.688596][  T329] 
[   21.688921][  T329] =============================
[   21.689127][  T329] WARNING: suspicious RCU usage
[   21.689311][  T329] 6.14.0-rc6-virtme #1 Not tainted
[   21.689494][  T329] -----------------------------
[   21.689672][  T329] ./include/net/net_namespace.h:418 suspicious rcu_dereference_check() usage!
[   21.689964][  T329] 
[   21.689964][  T329] other info that might help us debug this:
[   21.689964][  T329] 
[   21.690314][  T329] 
[   21.690314][  T329] rcu_scheduler_active = 2, debug_locks = 1
[   21.690575][  T329] 1 lock held by mausezahn/329:
[   21.690758][  T329]  #0: ffffffffb795b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x1f0/0x18d0
[   21.691101][  T329] 
[   21.691101][  T329] stack backtrace:
[   21.691351][  T329] CPU: 2 UID: 0 PID: 329 Comm: mausezahn Not tainted 6.14.0-rc6-virtme #1
[   21.691356][  T329] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   21.691359][  T329] Call Trace:
[   21.691361][  T329]  <TASK>
[   21.691363][  T329]  dump_stack_lvl+0xb0/0xd0
[   21.691372][  T329]  lockdep_rcu_suspicious+0x1ea/0x280
[   21.691385][  T329]  dev_hard_start_xmit+0x2fc/0x3f0
[   21.691395][  T329]  __dev_queue_xmit+0xfaf/0x18d0
[   21.691410][  T329]  ? __pfx___dev_queue_xmit+0x10/0x10
[   21.691414][  T329]  ? packet_parse_headers+0x231/0x9c0
[   21.691423][  T329]  ? __pfx_sock_alloc_send_pskb+0x10/0x10
[   21.691430][  T329]  ? __pfx_packet_parse_headers+0x10/0x10
[   21.691435][  T329]  ? skb_copy_datagram_from_iter+0xe6/0x6f0
[   21.691441][  T329]  ? dev_get_by_index+0xb2/0x190
[   21.691452][  T329]  packet_snd+0xd0c/0x19d0
[   21.691464][  T329]  ? __lock_release+0x103/0x460
[   21.691468][  T329]  ? __might_fault+0x11b/0x170
[   21.691477][  T329]  ? __pfx_packet_snd+0x10/0x10
[   21.691479][  T329]  ? trace_lock_acquire+0x14c/0x1f0
[   21.691481][  T329]  ? __might_fault+0x11b/0x170
[   21.691488][  T329]  ? lock_acquire+0x32/0xc0
[   21.691494][  T329]  ? __might_fault+0x11b/0x170
[   21.691505][  T329]  __sys_sendto+0x3c3/0x450
[   21.691511][  T329]  ? __pfx___sys_sendto+0x10/0x10
[   21.691526][  T329]  ? sock_ioctl+0x3b6/0x590
[   21.691529][  T329]  ? _copy_to_user+0x5c/0x80
[   21.691539][  T329]  ? __pfx_put_timespec64+0x10/0x10
[   21.691548][  T329]  ? posix_cpu_clock_get+0xe1/0x240
[   21.691557][  T329]  ? __x64_sys_clock_gettime+0x17a/0x200
[   21.691562][  T329]  ? __pfx___x64_sys_clock_gettime+0x10/0x10
[   21.691569][  T329]  __x64_sys_sendto+0xe0/0x1c0
[   21.691573][  T329]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[   21.691579][  T329]  do_syscall_64+0xc1/0x1d0
[   21.691588][  T329]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   21.691594][  T329] RIP: 0033:0x7f1d19c86a4a
[   21.691599][  T329] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 15 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 7e c3 0f 1f 44 00 00 41 54 48 83 ec 30 44 89
[   21.691602][  T329] RSP: 002b:00007ffd287e0988 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   21.691606][  T329] RAX: ffffffffffffffda RBX: 000000002bbf49d0 RCX: 00007f1d19c86a4a
[   21.691609][  T329] RDX: 0000000000000012 RSI: 000000002bbf4bd2 RDI: 0000000000000005
[   21.691610][  T329] RBP: 000000002bbf4bd2 R08: 00007ffd287e0990 R09: 0000000000000014
[   21.691612][  T329] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[   21.691614][  T329] R13: 0000000000000012 R14: 00007ffd287e0990 R15: 0000000000000000
[   21.691630][  T329]  </TASK>
[   39.640850][  T353] 8021q: 802.1Q VLAN Support v1.8
[  159.235054][  T579] ip (579) used greatest stack depth: 24256 bytes left
[  400.536420][  T326] veth2: left promiscuous mode
[  423.004316][ T1517] br0: port 1(veth1) entered blocking state
[  423.004785][ T1517] br0: port 1(veth1) entered disabled state
[  423.005268][ T1517] veth1: entered allmulticast mode
[  423.010630][ T1517] veth1: entered promiscuous mode
[  423.012981][ T1517] br0: port 1(veth1) entered blocking state
[  423.013434][ T1517] br0: port 1(veth1) entered forwarding state
[  423.103976][ T1518] br1: port 1(veth3) entered blocking state
[  423.104345][ T1518] br1: port 1(veth3) entered disabled state
[  423.104659][ T1518] veth3: entered allmulticast mode
[  423.106649][ T1518] veth3: entered promiscuous mode
[  423.115601][ T1518] br1: port 1(veth3) entered blocking state
[  423.115954][ T1518] br1: port 1(veth3) entered forwarding state
[  423.821538][ T1531] veth2: entered promiscuous mode

WAIT TIMEOUT stderr

Ctrl-C stderr

Ctrl-C stderr
[  724.904366][ T1531] veth2: left promiscuous mode

WAIT TIMEOUT stderr